Improvement in post-drivers



I. V. ADAIR.

Post-Drivers.

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ISAAC V. ADAIR, OF ROMULUS, NEW YORK.

IMPROVEMENT IN POST-DRIVERS.

Specification forming part of Letters Patent No. 137,120, dated MarchQ5, 1873i VTo all whom it may concern: l

Be it known that I, IsAAo V. ADAIR, of Romulus, in the county of Senecaand State of New York, have invented a new and Improved Post-Driver, ofwhich the following is a specification: l

Figure l is a sectional side elevation of my improved post-driver. Fig.2 is a top view of the same; Fig. 3, an end view, partly in section, ofthe same. Fig. 4 is a detail face view ofthe standards o and catch p.

Similar letters of reference indicate corresponding parts.

The invention consists in improving postdri vers, as hereinafter fullydescribed and subsequently pointed out in the claims.

A in the drawing represents the wagonframe. Upfn it is placed a narrowframe, B resting on false holsters a a, as shown in Fig. 3. The endpieces b b of the frame B are curved on the lower edge, to form a cradleon which the frame B can vibrate laterally. -Lon, gitudinal displacementof B is prevented by a tenon, d, ou one of the pieces b entering amortise in the false bolster a beneath, all as clearly shown in Fig. 3.By a lever, e, and link f the rocking frame is connected with the reachg of the wagon so that it can, by such connection, be locked at anysuitable angle. This is for the purpose of bringing the hammer straightdown upon the post, even if the wagon stands inclined. (l is a shaft orwindlass, hung in a frame, D, which is, at lf, pivoted to the frame B.The other end of D is connected by a spring, i, with the frame B,whereby it and the shaft G are made yielding up and down. A cam, j, isaffixed to the Windlass.

The object of hinging the windlass-frame at one end' and connecting itwith the spring at the other is to cause this frame to act like asafety-valve. As the hammers cannot at first make the entire sweep, andas the cam must turn all the way round, something would give way exceptfor this spring and hinge applied to the frame in this way.

E is a lever, pivoted at Ztoone end of the u frame B', and extendingabove said frame toward the other end, where it has a weight or hammer,m, attached to it.

By turning the windlass and the cam j,

which is under the lever E, by horse-power or otherwise, the lever Ewill be alternately raised and dropped to have the desired effect uponthe post under the hammer. rlhe upper part of the post fits between armsn n that project from the end of B. The lever E is, in its motions,guided between two standards, o o, that project from the frame B. Tothese two standards is applied a pivoted catch, p, by which the lever Ecan be held elevated while the post is bein g handled under the hammer.The shaft of the windlass can be made to slide in the bearings andlocked by a key, r, and unlocked whenthe cam is to be drawn out fromunder the lever E, and the operatingrope rewound upon thewindlass.

Having thus described my invention, I claim as new and desire to secureby Letters Patentl. In a post-driver, the narrow frame B resting onfalse bolsters a c and having curved tenoned end pieces d d,constructed, and applicable to the running-gear of a wagon, as and forthe purpose described.

2. The windlass-frame Dof a post-driver, connected at one end by ahinge-joint, h, and at the other by a spring, 1", as and for thepurpose' set forth.

3. The combination, in a post-driver, of a rocker-frame, B, frame Dpivoted thereto, cam and shaft C j, and hammenshaft E, construct ed andarranged substantially as and for the purpose described.

ISAAC V. ADAIR. Witnesses:

J o. BROOKS, A. D. HrLEs.

